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Income Taxes - Schedule of Total Income Tax Expense (Details) - USD ($)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income before income tax provision $ 13,626,131 $ 15,048,773 $ 18,129,648
Tax at the PRC EIT tax rates 3,406,532 3,762,193 4,532,412
Effect of preferential tax (574,656) (554,322) (774,299)
Change in valuation allowance 335,175 487,037 37,169
Tax effect of non-deductible expenses 485,798 451,154 1,660,869
Tax effect of R&D expenses additional deduction* [1] (864,025) (688,329) (742,608)
Income tax expense $ 2,788,824 $ 3,457,733 $ 4,713,543
[1] According to PRC tax regulations, an additional of 100% of current year R&D expenses may be deducted from tax income.